DIFFERENTIAL DIAGNOSIS IN ANAPHYLAXIS

Çağla Karavaizoğlu

Başakşehir Çam and Sakura City Hospital, Department of Pediatric Immunology and Allergic Diseases, İstanbul, Türkiye

Karavaizoğlu Ç. Differential Diagnosis in Anaphylaxis. In: Harmancı K, editor. Childhood Anaphylaxis: New Developments in Diagnosis and Treatment. 1st ed. Ankara: Türkiye Klinikleri; 2025. p.239-247.

ABSTRACT

Anaphylaxis is a rapidly emerging, potentially fatal hypersensitivity reaction that may arise through multiple underlying pathways. It often develops in response to an identifiable trigger and manifests with various clinical signs and symptoms. Because several organ systems are typically involved, a wide differential diagnosis is necessary. Timely recognition and immediate treatment are crucial to prevent serious outcomes. In pediatric patients, vasovagal syncope frequently represents the closest clinical mimic. The overall pattern of symptom presentation, the trajectory of the clinical course, and the response to initial interventions offer valuable guidance in distinguishing anaphylaxis from other conditions. Differential diagnoses also include urticaria, angioedema, asthma flare-ups, and a range of cardiac, neuropsychiatric, endocrine, and gastrointestinal disorders. The most critical elements in differentiating these diagnoses are a comprehensive medical history and a thorough physical examination. While laboratory tests can be valuable as adjuncts in suspected cases, it is essential to remember that the diagnosis of anaphylaxis is primarily clinical.

Keywords: Anaphylaxis; Differential diagnosis; Hypersensitivity; Child

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